I'm in the process of defining what has to occur during a bootload operation, at a high level. The actual code delivery will be from another PIC that talks to the target over a serial connection. So the code essentially passes from a host on one serial port, and then to the target. When its 'done'...I'm guessing that the final command can be...goto 0x000 for a soft reset. Reasonable? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist